(19)
(11) EP 1 889 896 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
10.09.2008 Bulletin 2008/37

(43) Date of publication A2:
20.02.2008 Bulletin 2008/08

(21) Application number: 07111837.6

(22) Date of filing: 05.07.2007
(51) International Patent Classification (IPC): 
C10M 163/00(2006.01)
C10N 30/04(2006.01)
C10N 40/26(2006.01)
C10N 40/25(2006.01)
 C10M 165/00(2006.01)
C10N 40/25(2006.01)
C10N 30/04(2006.01)
C10N 40/26(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 08.08.2006 US 500730
03.07.2007 US 772896

(71) Applicant: Infineum International Limited
Abingdon, Oxfordshire OX13 6BB (GB)

(72) Inventors:
  • Dodd, James, Christian, c/o Infineum UK Ltd.
    Abingdon, Oxfordshire, OX13 6BB (GB)
  • Spencer, Jeremy, Roger, c/o Infineum UK Ltd.
    Abingdon, Oxfordshire, OX13 6BB (GB)
  • Bera, Tushar, c/o Infineum USA L.P.
    Linden, NJ 07036 (US)
  • Emert, Jacob, c/o Infineum USA L.P.
    Linden, NJ 07036 (US)
  • Girshick, Frederick, Wein, c/o Infineum USA L.P.
    Linden, NJ 07036 (US)
  • Hoey, Michael, Dennis, c/o Infineum USA L.P.
    Linden, NJ 07036 (US)

(74) Representative: Lewis, Pauline Therese et al
Infineum International Ltd., P.O. Box 1,
Milton Hill, Oxfordshire OX13 6BB
Milton Hill, Oxfordshire OX13 6BB (GB)

   


(54) Lubricating oil composition containing detergent additives


(57) A lubricating oil composition having a total base number of more than 15 mg KOH/g, as determined by ASTM D2896, and including at least 40 mass % of an oil of lubricating viscosity; at least one detergent; and at least one compound of the formula (I) and/or formula (II):



In formula (I), each Ar independently represents an aromatic moiety having 0 to 3 substituents selected from the group consisting of alkyl, alkoxy, alkoxyalkyl, aryloxy, aryloxyalkyl, hydroxy, hydroxyalkyl, halo and combinations thereof; each L is independently a linking moiety comprising a carbon-carbon single bond or a linking group; each Y is independently -OR1" or a moiety of the formula H(O(CR12)n)yX-, wherein X is selected from the group consisting of (CR1'2)z, O and S; R1 and R1' are each independently selected from H, C1 to C6 alkyl and aryl; R1" is selected from C1 to C100 alkyl and aryl; z is 1 to 10; n is 0 to 10 when X is (CR1'2)z, and 2 to 10 when X is O or S; and y is 1 to 30; each a is independently 0 to 3, with the proviso that at least one Ar moiety bears at least one group Y; and m is 1 to 100. In formula (II), each Ar' independently represents an aromatic moiety having 0 to 3 substituents selected from the group consisting of alkyl, alkoxy, alkoxyalkyl, hydroxy, hydroxyalkyl, acyloxy, acyloxyalkyl, aryloxy, aryloxy alkyl, halo and combinations thereof; each L' is independently a linking moiety comprising a carbon-carbon single bond or a linking group; each Y' is independently a moiety of the formula Z(O(CR22)n')y'X'-, wherein X' is selected from the group consisting of (CR2'2)z', O and S; R2 and R2' are each independently selected from H, C1 to C6 alkyl and aryl; z' is 1 to 10; n' is 0 to 10 when X' is (CR2'2)z', and 2 to 10 when X' is O or S; y' is 1 to 30; Z is H, an acyl group, an alkyl group or an aryl group; each a' is independently 0 to 3, with the proviso that at least one Ar' moiety bears at least one group Y' in which Z is not H; and m' is 1 to 100.





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